I've taken Ruta many times and have never had it bring on a menstrual cycle. I think the low doses available in health food stores are too low to do something like that to most people.
I get most of my homeopathic remedies at a local health food store. If I find I need a remedy not sold locally, I order it from abchomeopathy.com (I have no financial connections with this website/company).
Homeopathy pellets are sugar pills upon which the energy of the original substance is imprinted. Ruta is a plant (Ruta Graveolens). There are no preservatives, and most people, even those who are allergic to milk or lactose intolerant, have no problems tolerating homeopathy. If you want to avoid the small amount of sugar, there are liquid tinctures (alcohol-based) available online.
Chronic Lyme Disease, Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, chronic Lymphopenia, intermittant pancytopenia, chronic malabsorption/malnutrition, etc.; G-Tube; Currently TPN-dependent.
Meds: Zofran, Pulmicort, IV Ceftazidime, Heparin (to flush PICC line), Claritin, Domperidone, Colloidal Silver (used topically), probiotics, homeopathy.